MP2364DF

TM EV2364DF-01A 1.5A, 23V, 1.4MHz Dual Step-Down Converter Evaluation Board The Future of Analog IC Technology TM DESCRIPTION The EV2364DF-01A is an evaluation board for the MP2364, a dual output, monolithic step-down switch mode converter with built-in internal power MOSFETs. It achieves 1.5A continuous output current for each output over a wide input supply range with excellent load and line regulation. The MP2364’s current mode operation provides fast transient response and eases loop stabilization. Its fault protection includes cycle-by-cycle current limiting and thermal shutdown. In shutdown mode the regulator draws 40µA of supply current. FEATURES • • • • • • • • • • 1.5A Current for Each Output Ceramic Input and Output Capacitors Up to 90% Efficiency Fixed 1.4MHz Frequency Wide 4.75V to 23V Operating Input Range Distributed Power Systems I/O and Core Supplies DSL Modems Set Top Boxes Cable Modems APPLICATIONS “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage A Output Voltage B Symbol VIN VOUTA VOUTB Value 4.75 to 23 3.3 2.5 Units V V V EV2364DF-01A EVALUATION BOARD Efficiency vs Load Current 100 90 VOUT=3.3V VOUT=5V EFFICIENCY (%) 80 70 60 VOUT=2.5V (L x W x H) 2.2” x 1.6” x 0.4” (5.5cm x 4.1cm x 1.0cm) Board Number EV2364DF-01A MPS IC Number MP2364DF 50 0 0.5 1.0 LOAD CURRENT (A) 1.5 MP2364_EC01 EV2364DF-01A Rev. 1.1 3/1/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 1 TM EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD EVALUATION BOARD SCHEMATIC VIN 4.75V to 23V GND D1 NS OPTIONAL 5V INPUT ONLY SSA ENA U1 ENA COMPA FBA SGB PGB SWB INB NC2 BSB SSB NC1 BSA INA SWA C8 2.2nF D4 NS OPTIONAL 5V INPUT ONLY C2 10nF VOUTA 3.3V @ 1.5A GND C4 NS C13 82pF VOUTB 2.5V @ 1.5A GND D2 B230A-13 PGA SGA FBB MP2364 C7 10nF D3 B230A-13 C10 NS COMPB ENB C5 3.3nF ENB EV2364_S01 EV2364DF-01A BILL OF MATERIALS Qty 2 2 2 2 1 1 2 1 2 2 2 1 1 3 1 1 Ref C1, C6 C2, C7 C3, C9 C4, C10 C5 C8 C11, C12 C13 D1, D4 D2, D3 L1, L2 3.3nF 2.2nF 10µF 82pF Value Description Package Manufacturer P/N 0805 0603 1210 TDK: C2012X7R1C474K TDK: C1608X7R1H103K TDK: C3225X5R0J226M Panasonic: ECJ-1VB1H332K TDK: C1608X7R1H222K TDK: C3225X7R1E106M TDK: C1608C0G1H820J Diodes Inc: B230A-13 Sumida: CDRH6D28-5R0NC Any Any Any Any MPS: MP2364DF Distributor P/N Digikey: 445-1357-1-ND Digikey: 445-1311-1-ND Digikey: 445-1404-1-ND Digikey: PCC1778CT-ND Digikey: 445-1309-1-ND Digikey: 445-1434-1-ND Digikey: 445-1280-1-ND Digikey: B230ADICT-ND 0.47µF Ceramic Capacitor, 16V, X7R 10nF 22µF Ceramic Capacitor, 50V, X7R Ceramic Capacitor, 6.3V, X5R Do Not Stuff Ceramic Capacitor, 50V, X7R Ceramic Capacitor, 50V, X7R Ceramic Capacitor, 25V, X7R Ceramic Capacitor, 50V, NPO Do Not Stuff Schottky Diode, 30V, 2A, SMA Inductor, 5uH, 2.4A, SMD 0603 0603 0603 0603 0603 0603 1210 0603 R1 25.5kΩ Resistor, 1% R2 7.5kΩ Resistor, 5% R3, R5, R6 10kΩ Resistor, 1% R4 16.9kΩ Resistor, 1% U1 DC/DC Converter, TSSOP20 Any Any Any Any EV2364DF-01A Rev. 1.1 3/1/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 2 TM EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV2364DF-01A Rev. 1.1 3/1/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 3 TM EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD QUICK START GUIDE The output voltages of this board are set to 3.3V (VOUTA) and 2.5V (VOUTB). The board layout accommodates most commonly used inductors and output capacitors. 1. Attach the positive and negative ends of the first load to the VOUTA and GND pins, respectively. If using both outputs, attach the positive and negative ends of the second load to the VOUTB and GND pins, respectively. 2. Preset the power supply output to 4.75V to 23V and turn it off. 3. Connect the positive terminal of the power supply output to the VIN pin and the negative terminal of the power supply output to the GND pin. 4. Turn the power supply on. The MP2364 will automatically startup. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 2.5V to turn on the regulator and less than 0.7V to turn it off. 6. The output voltages VOUTA and VOUTB can be changed by varying R1 and R4, respectively. Calculate the new values by the following formulae: ⎞ ⎛V R1 = R6 × ⎜ OUTA − 1⎟ ⎟ ⎜ 0.92 ⎠ ⎝ ⎞ ⎛V R4 = R3 × ⎜ OUTB − 1⎟ ⎟ ⎜ 0.92 ⎠ ⎝ Where R6 = 10kΩ and R3 = 10kΩ Example: For VOUTA = 3.3V: R1 = 10kΩ × ( 3. 3 − 1) = 25.9kΩ 0.92 Therefore, use a 25.5kΩ standard 1% value resistor. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV2364DF-01A Rev. 1.1 3/1/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 4